From: Jacob Keller Date: Thu, 18 Jun 2020 18:46:11 +0000 (-0700) Subject: ice: implement snapshot for device capabilities X-Git-Tag: v5.10.7~1943^2~362^2~2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8d7aab3515fa1f9774939537419fecf5247689a9;p=platform%2Fkernel%2Flinux-rpi.git ice: implement snapshot for device capabilities Add a new devlink region used for capturing a snapshot of the device capabilities buffer which is reported by the firmware over the AdminQ. This information can useful in debugging driver and firmware interactions. Signed-off-by: Jacob Keller Tested-by: Andrew Bowers Signed-off-by: Tony Nguyen --- diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h index a4cda8212e64..7486d010a619 100644 --- a/drivers/net/ethernet/intel/ice/ice.h +++ b/drivers/net/ethernet/intel/ice/ice.h @@ -373,6 +373,7 @@ struct ice_pf { struct devlink_port devlink_port; struct devlink_region *nvm_region; + struct devlink_region *devcaps_region; /* OS reserved IRQ details */ struct msix_entry *msix_entries; diff --git a/drivers/net/ethernet/intel/ice/ice_common.c b/drivers/net/ethernet/intel/ice/ice_common.c index bce0e1281168..e3cb7bd1ecab 100644 --- a/drivers/net/ethernet/intel/ice/ice_common.c +++ b/drivers/net/ethernet/intel/ice/ice_common.c @@ -1823,20 +1823,27 @@ ice_parse_caps(struct ice_hw *hw, void *buf, u32 cap_count, } /** - * ice_aq_discover_caps - query function/device capabilities + * ice_aq_list_caps - query function/device capabilities * @hw: pointer to the HW struct - * @buf: a virtual buffer to hold the capabilities - * @buf_size: Size of the virtual buffer - * @cap_count: cap count needed if AQ err==ENOMEM - * @opc: capabilities type to discover - pass in the command opcode + * @buf: a buffer to hold the capabilities + * @buf_size: size of the buffer + * @cap_count: if not NULL, set to the number of capabilities reported + * @opc: capabilities type to discover, device or function * @cd: pointer to command details structure or NULL * - * Get the function(0x000a)/device(0x000b) capabilities description from - * the firmware. + * Get the function (0x000A) or device (0x000B) capabilities description from + * firmware and store it in the buffer. + * + * If the cap_count pointer is not NULL, then it is set to the number of + * capabilities firmware will report. Note that if the buffer size is too + * small, it is possible the command will return ICE_AQ_ERR_ENOMEM. The + * cap_count will still be updated in this case. It is recommended that the + * buffer size be set to ICE_AQ_MAX_BUF_LEN (the largest possible buffer that + * firmware could return) to avoid this. */ -static enum ice_status -ice_aq_discover_caps(struct ice_hw *hw, void *buf, u16 buf_size, u32 *cap_count, - enum ice_adminq_opc opc, struct ice_sq_cd *cd) +enum ice_status +ice_aq_list_caps(struct ice_hw *hw, void *buf, u16 buf_size, u32 *cap_count, + enum ice_adminq_opc opc, struct ice_sq_cd *cd) { struct ice_aqc_list_caps *cmd; struct ice_aq_desc desc; @@ -1849,12 +1856,43 @@ ice_aq_discover_caps(struct ice_hw *hw, void *buf, u16 buf_size, u32 *cap_count, return ICE_ERR_PARAM; ice_fill_dflt_direct_cmd_desc(&desc, opc); - status = ice_aq_send_cmd(hw, &desc, buf, buf_size, cd); + + if (cap_count) + *cap_count = le32_to_cpu(cmd->count); + + return status; +} + +/** + * ice_aq_discover_caps - query function/device capabilities + * @hw: pointer to the HW struct + * @buf: a virtual buffer to hold the capabilities + * @buf_size: Size of the virtual buffer + * @cap_count: cap count needed if AQ err==ENOMEM + * @opc: capabilities type to discover - pass in the command opcode + * @cd: pointer to command details structure or NULL + * + * Get the function(0x000a)/device(0x000b) capabilities description from + * the firmware. + * + * NOTE: this function has the side effect of updating the hw->dev_caps or + * hw->func_caps by way of calling ice_parse_caps. + */ +static enum ice_status +ice_aq_discover_caps(struct ice_hw *hw, void *buf, u16 buf_size, u32 *cap_count, + enum ice_adminq_opc opc, struct ice_sq_cd *cd) +{ + u32 local_cap_count = 0; + enum ice_status status; + + status = ice_aq_list_caps(hw, buf, buf_size, &local_cap_count, + opc, cd); if (!status) - ice_parse_caps(hw, buf, le32_to_cpu(cmd->count), opc); + ice_parse_caps(hw, buf, local_cap_count, opc); else if (hw->adminq.sq_last_status == ICE_AQ_RC_ENOMEM) - *cap_count = le32_to_cpu(cmd->count); + *cap_count = local_cap_count; + return status; } diff --git a/drivers/net/ethernet/intel/ice/ice_common.h b/drivers/net/ethernet/intel/ice/ice_common.h index 9b9e50d2398b..e72529e9f022 100644 --- a/drivers/net/ethernet/intel/ice/ice_common.h +++ b/drivers/net/ethernet/intel/ice/ice_common.h @@ -87,6 +87,9 @@ enum ice_status ice_aq_get_phy_caps(struct ice_port_info *pi, bool qual_mods, u8 report_mode, struct ice_aqc_get_phy_caps_data *caps, struct ice_sq_cd *cd); +enum ice_status +ice_aq_list_caps(struct ice_hw *hw, void *buf, u16 buf_size, u32 *cap_count, + enum ice_adminq_opc opc, struct ice_sq_cd *cd); void ice_update_phy_type(u64 *phy_type_low, u64 *phy_type_high, u16 link_speeds_bitmap); diff --git a/drivers/net/ethernet/intel/ice/ice_devlink.c b/drivers/net/ethernet/intel/ice/ice_devlink.c index a73d06e06b5d..3ea470e8cfa2 100644 --- a/drivers/net/ethernet/intel/ice/ice_devlink.c +++ b/drivers/net/ethernet/intel/ice/ice_devlink.c @@ -397,12 +397,60 @@ static int ice_devlink_nvm_snapshot(struct devlink *devlink, return 0; } +/** + * ice_devlink_devcaps_snapshot - Capture snapshot of device capabilities + * @devlink: the devlink instance + * @extack: extended ACK response structure + * @data: on exit points to snapshot data buffer + * + * This function is called in response to the DEVLINK_CMD_REGION_TRIGGER for + * the device-caps devlink region. It captures a snapshot of the device + * capabilities reported by firmware. + * + * @returns zero on success, and updates the data pointer. Returns a non-zero + * error code on failure. + */ +static int +ice_devlink_devcaps_snapshot(struct devlink *devlink, + struct netlink_ext_ack *extack, u8 **data) +{ + struct ice_pf *pf = devlink_priv(devlink); + struct device *dev = ice_pf_to_dev(pf); + struct ice_hw *hw = &pf->hw; + enum ice_status status; + void *devcaps; + + devcaps = vzalloc(ICE_AQ_MAX_BUF_LEN); + if (!devcaps) + return -ENOMEM; + + status = ice_aq_list_caps(hw, devcaps, ICE_AQ_MAX_BUF_LEN, NULL, + ice_aqc_opc_list_dev_caps, NULL); + if (status) { + dev_dbg(dev, "ice_aq_list_caps: failed to read device capabilities, err %d aq_err %d\n", + status, hw->adminq.sq_last_status); + NL_SET_ERR_MSG_MOD(extack, "Failed to read device capabilities"); + vfree(devcaps); + return -EIO; + } + + *data = (u8 *)devcaps; + + return 0; +} + static const struct devlink_region_ops ice_nvm_region_ops = { .name = "nvm-flash", .destructor = vfree, .snapshot = ice_devlink_nvm_snapshot, }; +static const struct devlink_region_ops ice_devcaps_region_ops = { + .name = "device-caps", + .destructor = vfree, + .snapshot = ice_devlink_devcaps_snapshot, +}; + /** * ice_devlink_init_regions - Initialize devlink regions * @pf: the PF device structure @@ -424,6 +472,15 @@ void ice_devlink_init_regions(struct ice_pf *pf) PTR_ERR(pf->nvm_region)); pf->nvm_region = NULL; } + + pf->devcaps_region = devlink_region_create(devlink, + &ice_devcaps_region_ops, 10, + ICE_AQ_MAX_BUF_LEN); + if (IS_ERR(pf->devcaps_region)) { + dev_err(dev, "failed to create device-caps devlink region, err %ld\n", + PTR_ERR(pf->devcaps_region)); + pf->devcaps_region = NULL; + } } /** @@ -436,4 +493,6 @@ void ice_devlink_destroy_regions(struct ice_pf *pf) { if (pf->nvm_region) devlink_region_destroy(pf->nvm_region); + if (pf->devcaps_region) + devlink_region_destroy(pf->devcaps_region); }